The upper feed dog differential adjustment rocker is added, and the upper and lower adjustment screws are added to facilitate the adjustment of the upper feed dog. The ease of use is greatly increased. lt is suitable for thick sweaters, sweaters, down jackets, thermal underwear, swimsuit,.and multilayer slippery fabrics. And other processes, provide high-quality sewing.
Cylinder-bed
Differential feed adjustment
RB-EXT5100-3D RB-EXT5100-4D 
1 2 
DCX27 11-14# DCX27 11-14# 
3 4 
_ 2 
4 4 
0.6-3.2 0.6-3.2 
0.7-2.4 0.7-2.4 
○ ○ 
○ ○ 
5.5 5.5 
6000 6000 
470X370X500 470X370X500 
29/35 29/35
